hidden categories should also show the singular form

[desb42]

Looking at de.wikipedia.org/wiki/Kategorie:Datei:Commonsduplikat

There is only one hidden category
But, xowa shows Versteckte Kategorien which is the plural
It should be Versteckte Kategorie

This stems from the file 400_xowa\src\gplx\xowa\addons\wikis\ctgs\htmls\pageboxs\doubles\Xoctg_double_grp.java
where there is the line:

byte[] lbl_hidden = wiki.Msg_mgr().Val_by_id_args(Xol_msg_itm_.Id_ctg_tbl_hidden, count);

Id_ctg_tbl_hidden in 400_xowa\src\gplx\xowa\langs\msgs\Xol_msg_itm_.java refers to a link hidden-category-category, if this name is changed to hidden-categories
Then this will 'correct' the issue

https://de.wikipedia.org/w/index.php?title=MediaWiki:Hidden-categories&action=edit gives

{{PLURAL:$1|Versteckte Kategorie|Versteckte Kategorien}}

[gnosygnu]

Great breakdown of issue. Made the change as you suggested. Thanks!